“I have enjoyed my years of service as a director of Kona Grill and enjoyed working with Marcus Jundt as co-CEO in helping revitalize the Kona Grill brand,” Schussler said in a statement, adding that as a founder of the company, Jundt is “committed to the company’s success.”

Jundt faces a tough challenge in his bid to revitalize Kona, which has struggled with a plunging stock price and weak sales.

Same-store sales fell 14.1% in the quarter ended Sept. 30. And the stock price, which as recently as 2015 was trading in the $20s per share, has been in the low single digits and closed at $1.30 per share on Thursday.

The company’s poor valuation led to a delisting notice from the Nasdaq Stock Exchange earlier this month. A delisting can be devastating for a company’s valuation because it forces a company to trade “over the counter,” meaning it can only be traded through a dealer network.